參數(shù)資料
型號: PM73488
廠商: PMC-SIERRA INC
元件分類: 數(shù)字傳輸電路
英文描述: 5 Gbit/s ATM Switch Fabric Element
中文描述: ATM SWITCHING CIRCUIT, PBGA596
封裝: EPBGA-596
文件頁數(shù): 88/135頁
文件大?。?/td> 1735K
代理商: PM73488
PMC-Sierra, Inc.
PM73488 QSE
L
PMC-980616
Issue 3
5 Gbit/s ATMSwitch Fabric Element
Released
Datasheet
90
NOTE: RESET assertion and deassertion is asynchronous to the clock.
Timing information for the SOC, BP, and ACK is given in Table 30.
Figure 41 shows the timing for the JTAG port. The /SCAN_TRST signal is asynchronous to SCAN_TCK.
Table 30.
Valid Window Timing
Symbol
Parameter
Min
Max
Unit
Vsoc
SOC valid
window
Local_CELL_START - 8
Local_CELL_START
SE_CLK periods
Vbprec
Valid
window
when BP is
accepted by
QSE
SE_SOC_OUT + 0
Local_CELL_START + 60
SE_CLK periods
Vbpgen
Valid
window
when BP is
generated by
QSE
Local_CELL_START + 15
(But in early BP mode:
Local CELL_START + 0
See “BP_CONTROL_REGISTER”
on page 109)
Local_CELL_START + 35
(But in early BP mode:
Local_CELL_START + 15
See“BP_CONTROL_REGISTER”
on page 109)
SE_CLK periods
Vack
Valid
window
when ACK is
accepted by
QSE
SE_SOC_OUT + 0
(Next cell time’s)
Local_CELL_START - 8
SE_CLK periods
Figure 41. JTAG Timing
Symbol
Parameter
Signals
Min
Max
Unit
SCAN_TCK frequency
10
MHz
Tch
SCAN_TCK high
40
ns
Tjres
Tch
Tjsu
Tjsu
Tjh
Tjh
Tcl
Tqj
Tqj
SCAN_TRST(i)
SCAN_TCK(i)
SCAN_TMS(i)
SCAN_TDI(i)
SCAN_TDO(o)
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